rfc v1 - rfc v2: - rebased onto tip/objtool/core - reformatted couple of lines
rfc v2 - rfc v3: - reused __*_ENDIAN_BITFIELD and dropped unneeded byteswap if __KERNEL__ is defined following David's suggestions, - re-splitted changes and made x86 instruction decoder a separate patch, - extra patch to add -Wno-nested-externs build flag to enable BUILD_BUG() usage, - added a safer and more readable leXX_to_cpu macro in x86 instruction decoder, - simplified includes. Switched to using leXX_to_cpu/cpu_to_leXX in the objtool and x86 instruction decoder since <linux/kernel.h> is included in the objtool already. Currently objtool seems to be the only tool from all the build tools needed for x86 build which breaks x86 cross compilation on big endian systems. But besides x86 cross compilation, endianness awareness is also needed for big endian architectures objtool support in general. We have working prototype of objtool support and orc unwinder for s390 made originally by Martin Schwidefsky. I'm trying to bring it in shape again and refactor to share more code with "generic" part. But first things first. This patch series points to endianness problems which should be addressed. Recent "other architectures support" patches currently moved only some problematic parts into x86 arch specific folder. Besides that even though big endian stuff is only needed for the objtool arch/x86/lib/insn.c and arch/x86/include/asm/insn.h are shared across the kernel source and the tools, so changes are applied to both. Any suggestions how to make patches more acceptable are welcome. Martin Schwidefsky (2): objtool: x86 instruction decoder and big endian cross compiles objtool: correct rebuilding of reloc sections Vasily Gorbik (2): objtool: allow nested externs to enable BUILD_BUG() objtool: fix x86 orc generation on big endian cross compiles arch/x86/include/asm/insn.h | 35 ++++++++ arch/x86/include/asm/orc_types.h | 10 +++ arch/x86/lib/insn.c | 108 ++++++++++++------------- tools/arch/x86/include/asm/insn.h | 35 ++++++++ tools/arch/x86/include/asm/orc_types.h | 10 +++ tools/arch/x86/lib/insn.c | 108 ++++++++++++------------- tools/objtool/Makefile | 2 +- tools/objtool/arch/x86/special.c | 2 +- tools/objtool/check.c | 4 +- tools/objtool/elf.c | 34 ++++---- tools/objtool/orc_dump.c | 4 +- tools/objtool/orc_gen.c | 2 + 12 files changed, 225 insertions(+), 129 deletions(-) -- ⣿⣿⣿⣿⢋⡀⣀⠹⣿⣿⣿⣿ ⣿⣿⣿⣿⠠⣶⡦⠀⣿⣿⣿⣿ ⣿⣿⣿⠏⣴⣮⣴⣧⠈⢿⣿⣿ ⣿⣿⡏⢰⣿⠖⣠⣿⡆⠈⣿⣿ ⣿⢛⣵⣄⠙⣶⣶⡟⣅⣠⠹⣿ ⣿⣜⣛⠻⢎⣉⣉⣀⠿⣫⣵⣿
